Automatic circuit breaker



N. E. AND O NELSON. AUTOMATIC CIRCUIT BREAKER.

APPLICATION HLEDROCT. 3, I919.

Patented Nov. '14, 1922.

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AUTOMATIC CIRCUIT BREAKER.

APPLICATION FILED OCT. 3. 1919.

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awvewbow Patented Nov. 14, 1922..

Patented Nov. 14, 1922.

UNITED STATES -NORR IS E. NELSON AND OTTO NELSON, OF SEATTLE,WASHINGTON.

AUTOMATIC CIRCUIT BREAKER.

Application filed October 3, 1919. Serial No. 328,180.

To all whom it may concern:

Be it known that we, NORRIS E. NnLsoN and O'r'ro NELSON, citizens of theUnited States, residing at Seattle, in the county of King and State of\Vashington, have invented certain new and useful Improvements inAutomatic Circuit Breakers; and we do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

This invention relates to automatic current breakers, and whileparticularly adapted to a current breaker having a local magneticcircuit broken by a breaking of the main circuit, it is not limitedthereto.

An object of this invention is to provide a circuit breaker for use inshops and on machines and in such places as where a current of highvoltage is used and it is desired to break a circuit from a remotepoint, or any number of points, where it is not desirable or possible tocarry a high voltage current.

A further object in this invention is to provide a simplified and moreefiicient means to break a current from a remote point, or any number ofpoints.

A further object of this invention is to utilize standard stock andeasily purchasable elements in the construction of a device of thischaracter.

A further object of this invention is to provide a device of thischaracter which automatically breaks the local magnetic circuit when themain circuit is broken.

' WVith these and other objects in view, the invention consists of theconstructions combination and the detail and arrangement of parts ashereinafter more fully described and claimed.

In the drawings:

Figure 1 is a side elevation of this device.

Figure 2 is a front elevation of this device.

Figure 3 is a rear elevation of this device.

Figure 4 is a plan view.

Figure 5 is a detail partly broken away of the catch mechanism.

Figure 6 is a diagrammatic wiring plan.

In detail the invention comprises an insulated base 2 having aflixedthereonclips 3, 3 and 3", the said clips forming a bar for a knifeswitch having knives respectively pivotally mounted on said cli s at 5,5 and 5", the said knives being designated respectively 4, 4 and 4", andhaving respectively in circuit therewith posts 6, 6 and 6 receivingwires respectively 7 7 and 7. Knives 4, 4 and 4" res ctively areinsertable into clips 8, 8" an 8*, the said clips being in circuitrespectively with wires 9, 9" and 9". Posts 10 mounted on base 2 supporta magnetic catch operating device 11 which comprises generally anelectroma et 11 and a catch 11 with suitable connections for operatingsaid catch 11 by said electromagnet 11 to throw same into or out ofengagement with catch 15. This mechanism may be of any. of the ordinarydevices for this purpose commonly on the market under the name of door 0ners, the articular form being immaterial to this invention.

As here shown this mechanism comprises a toggle 11"11 normally supportedby a pivoted member 11 controlled by a spring 11" and adapted to bethrown out of supportin relation with the toggle by'the operation 0 arm11 when drawn by magnets 11 (see Fi s. 4 and 5). Mounted on knives 4, 4and 4 is an insulated strip 12 carrying a latch 15 having a withdrawalcatch 15" operated by an insulated knob 15". Insulated strip 12 has anextension member 16 extending beyond the pivots 5, 5. and 5 and engaginga spring 17 which spring is afiixed to the base 2, and tends to throwopen the switch. The switch is held against the force of spring 17 bythe coacting catches 15 and 11, the withdrawal of either of which willrelease the switch to the operation of the spring.

The wiring system comprises wires 9 and 9 forming a circuit when theswitch is closed respectively with wires 7 and 7 and connected with suchdevices as it is desired to have in and out of circuit.

The central knife 4 closes and opens a circuit at 8 through wires 9 and7. Wire 9 passes through a battery or other energizing means at 12 andto and through a switch 7 it being possible to use any number of theseswitches and when desired on circuit with a wire 7. Wire also forms acircuit through coils 11. Thus, when switch 7 is closed and the knifeswitch is also closed, batteries 12 energize coils 11, which releasescatch 11 and the knife switch springs open. Immediately upon thespringing open of the knife switch the circuit through'wires; 7 and 9"is broken at 8 thus immediately the cirtomatically broken as soon as.the purposes.

of breaking the main circuit have been accomplished, thus preventing theexhaustion of the battery should the switch 7 be left closed.

While the foregoing description is for a knife switch having threeblades, the same method of construction will apply to switches ford-iiferent eurrents-whether two, three, four or five blades are used inthe switch.

What we claim is:

1. In combination, a knife switch adapted to make and break a principaland a secondary circuit, interacting'catches controlling said'knif'eswitch, one of said catches being manually operated while the other iscontrolled magnetically through the sec ond'ary circuit, and independentmeans for making and breaking said secondary circuit;

2; In combination with a switch adapted to make and break; a principaland sec-' ondary c1rcu1t, a palr of engaging catches,"

magnetic means operated by saidsecondary current for operating one ofthe catches and means for opening the switch and breaking both theprincipal and secondary currents upon: the-release of either of' saidcatches.

8. In combination with a switch, a pair of coacting catches, magneticmeans for opswitch, magnetic means for releasing said switch to beopened by said spring, an electrical circuit through one of said knivesenergizing said magnetic means, an independent electrical circuitthrough the other two of sa-id knives, all of said circuits broken bythe openingof said switch, and auxiliary means for making or breakingthe current controlling the magnetic release.

5. A means for automatically breaking a circuit from a remote point,orpoints, comprising a switch and means for urging said switch to open,two coacting catches for holding said switch in closed position, magnetic means for withdrawing one of said catches, and manual means towithdraw the other catch, the withdrawal of" either catch being adaptedto release said switch.

6. In combination, an insulated base member, a knife switch mounted onsaid base member, an insulated strip mounted on said knife switch, anextension member from said insulated strip, a spring between'said}extension member and said base member,

said spring tensioned to yieldingly hold said knife switch in openrelation, a manually operated catch mounted on said; insulated strip, amagnetically operated catch positioned relative to said manuallyoperated catch to engage the same so that therelease of" either one ofsaid catches releases said switch to be opened by said spring, and meansfor electrically energizing said magnetically operated catchindependently of the main current,

In testimony whereof we affixour signatu-res. I

nonnrs 11 NELSON.

orro NELSON.

